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Finding the Fourth Proportional to 959.64, 1,323.96 and 628.50

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Solution

The fourth proportional to 959.64, 1,323.96 and 628.50 is: 867.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    959.64 : 1,323.96 = 628.50 : x
  2. Step 2: Convert to fraction form
    959.64/1,323.96 = 628.50/x
  3. Step 3: Cross multiply
    959.64x = 1,323.96 × 628.50
  4. Step 4: Simplify right side
    959.64x = 832,108.86
  5. Step 5: Solve for x
    x = 832,108.86/959.64
  6. Step 6: Final answer
    x = 867.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.